506 GRAMINEA. 
21. Setaria semirugosa, Kunth, Enum. Pl. i. p. 152; Fourn. Mex. Pl. Enum., 
Gram. p. 47. 
Panicum rugosum, Nees, Agrostol. Bras. p. 243; Déll in Mart. Fl. Bras. ii. 2, p. 167. 
South Mexico (Karwinskt).—BRaziu. 
22. Setaria streptobotrys, Fourn. Mex. Pl. Enum., Gram. p. 47. 
NortH Mexico, San Luis Potosi (Virlet d Aoust); Sourn Mexico, Real del Monte, 
6000 feet (Galeotti, 5832), Chinantla and Mirador (Liebmann), Orizaba (Miller, 2067), 
valley of Mexico (Bourgeau, 231 in part; Schaffner). Hb. Kew. 
23. Setaria sulcata, Raddi, Agrostogr. Bras. p. 50; Fourn. Mex. Pl. Enum., 
Gram. p. 42 (varietates). 
Panicum (Ptychophyllum) sulcatum, Aublet, Guian. i. p. 50; Doll in Mart. Fl. Bras. 11. 2, p. 152, 
t. 26. 
Sout Mexico, valley of Cordova (Bourgeau, 1663 ; Schaffner), Mirador (Liebmann), 
Oaxaca at 3000 feet (Galeotti, 5856).— West Inpies; Brazit. Hb. Kew. 
24. Setaria uniseta, Fourn. Mex. Pl. Enum., Gram. p- 43. 
Panicum unisetum, Trin.; Steud. Gram. p. 178; Schl. in Linnea, xxxi. pp. 396, 398. 
Urochloa uniseta, Presl, Reliq. Henk. i. p. 319. 
Izophorus unisetus, Schl. in Linnea, xxxi. p. 421. 
Mexico, Hacienda de Naranjo (Karwinski), without locality (Henke). 
25. Setaria viridis, Beauv. Agrostogr. p.51; Kunth, Enum. Pl.i. p. 151; Fourn. 
Mex. Pl. Enum., Gram. p. 47. 
Mexico ? (Liebmann). 
11. CENCHRUS. 
Cenchrus, Linn. Gen. Plant. n. 1149, pro parte; Benth. et Hook. Gen. Plant. iii. p. 1105. 
A genus of about a dozen species, very widely diffused in tropical and subtropical 
regions of both hemispheres. In this, as in several other genera, Fournier has founded 
a number of new species of which we have not seen authenticated specimens. 
1. Cenchrus brevisetus, Fourn. Mex. Pl. Enum., Gram. p. 50. 
Sourh Mexico, valley of Orizaba (Bourgeau, 3140; Schaffner; Botteri, 133) ; 
Nicaragua (Lévy, 235). Hb. Kew. 
2. Cenchrus echinatus, Linn. Sp. Pl. ed. 1, p. 1050; Ch. et Schl. in Linnea, 
vi. p. 836; Benth. Pl. Hartw. p. 28; Fourn. Mex. Pl. Enum., Gram. p. 50; S. Wats. in 
Proc. Am. Acad. xviii. p. 173. | 
A very widely dispersed species, found in Mexico and CentRaL America. Hb. Kew. 
3. Cenchrus multiflorus, Pres), Reliq. Henk. i. p. 318; Fourn. Mex. Pl. Enum., 
Gram. p. 49. 
